KLA10983
Privilege escalation vulnerability in Windows IIS

An improper sanitizing of a specially designed request was found in Microsoft IIS Server. By exploiting this vulnerability malicious users can gain privileges. This vulnerability can be exploited remotely via a specially designed URL.

Windows Vista Service Pack 2
Windows 7 Service Pack 1
Windows 8.1
Windows RT
Windows 10
Windows Server 2008
Windows Server 2008 R2
Windows Server 2012
Windows Server 2012 R2

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)